Okay, so I calculated the average score per vote. This way Hall of Honour and Golden Nominations got into consideration. It is a purely mathematically determined list, based on average XP score. Of course I deducted the 10 XP boost for quests so the low vote quests did not get any advantages.

There was so much fuzz about the official list, I went to math to get an answer!

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Unofficial Winner:Mountain of Boats: (9)

Unofficial Runner Up:Corovorane's Cave: (7.5)

The Rest of the list in decreasing order:3. Crawlers of the Dark: (6.9)4. Illyana's Palace: (6.4)5. Torrent Falls: (6.3)5. Noil Ruins: (6,3)7. Mugama, the Gold that is not: (5.8 )8. Malicious Archeology: (5.3)9. The Great Barrow: (5.2)10. Hellgate Prison: (5)11. Barrows of the First Men: (4.4)12. Tower of Inversion: (4.3)13. House of the White Apes: (4.2) 14. The Red Ghost and the Crypt of the Ebony Princess: (4)14. Pegoran Doors: (4)14. Caern of the Steam Bringers: (4)17. An ecological Dungeon 3: Spirits and Unliving: (3.5)18. The Miscreant Labyrinth: (3.4)19. Dungeon National Park: (2.6)20. The Littered Halls: (2.1)21. Altar of the Sun: (0)

Seems like Mountain of Boats is the winner which ever way we look at it! Dang, MoB RULES. Look at that lead!